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Finding the Fourth Proportional to 5,415.16, 8,119.10 and 1,951.96

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Solution

The fourth proportional to 5,415.16, 8,119.10 and 1,951.96 is: 2,926.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.16 : 8,119.10 = 1,951.96 : x
  2. Step 2: Convert to fraction form
    5,415.16/8,119.10 = 1,951.96/x
  3. Step 3: Cross multiply
    5,415.16x = 8,119.10 × 1,951.96
  4. Step 4: Simplify right side
    5,415.16x = 15,848,158.44
  5. Step 5: Solve for x
    x = 15,848,158.44/5,415.16
  6. Step 6: Final answer
    x = 2,926.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.